BU7839GVW_10 Datasheet, PDF (6/16 Pages) Rohm – Digital Input Class-D Headphone Amplifier

BU7839GVW
●Application circuit chart
MCLK
BCLK
DSP
LRCLK
SDI
DVDD～2.8V
DVDDIO
Audio
I/F
CPU
SCL
SDA
NRST
L: reset
2wire
CPU I/F
ADR
Device address
L: 33h
H: 36h
●Measurement circuit chart
Technical Note
Interpolator
ΔΣ
Modulator
Interpolator
ΔΣ
Modulator
Register
Power
on/off
control
Level Shifter
Level Shifter
256fs
PLL
MUTE_R
VDD_R 2.8V
OUT_R
220uF
100uH
VSS_R ^0.1uF
16Ω
MUTE_L
VDD_L 2.8V
OUT_L
220uF
100uH
16Ω
VSS_L ^0.1uF
PLLVDD ^2.8V
0.068uF
PLLCAP
DVSS
TEST
DVDD
1.5V
DVSS
REFCLK
12MHz in
Recommended parts
Coil : murata Manufacturing LQH32CN101K23
Schottky diode : ROHM RSX201L-30
Capacitor : Rohm TCTAL0G227M8R-D2
Fig.3 Application circuit chart
DSP
MCLK
BCLK
LRCLK
SDI
DVDD～2.8V
DVDDIO
Audio
I/F
CPU
SCL
SDA
NRST
L: reset
2wire
CPU I/F
ADR
Device address
L: 33h
H: 36h
Interpolator
ΔΣ
Modulator
Level Shifter
Interpolator
ΔΣ
Modulator
Register
Power
on/off
control
Level Shifter
256fs
PLL
TEST
DVDD
1.5V
DVSS
REFCLK
12MHz in
Fig.4 Measurement circuit chart
MUTE_R
VDD_R 2.8V
OUT_R
VSS_R
220uF
100uH
0.1uF
16Ω
20KHz LPF
A-Weight
MUTE_L
VDD_L 2.8V
OUT_L
VSS_L
220uF
100uH
0.1uF 16Ω
PLLVDD ^2.8V
0.068uF
PLLCAP
DVSS
20KHz LPF
A-Weight
Audio
Analyzer
Audio
Analyzer
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2010.05 - Rev.A